I am on a Mac and I need to authorize the account to my wife's email address instead of mine. I have been told to activate Kobo reader / ADE and click command/shift D at the same time and a de-authorize message appears. I have tried this over and over and I get nothing. Any suggestions?

Hi Peter - thanks for your quick reply. My problem is that's what I've been doing on my Mac. I click command / shift/ D and absolutely nothing happens.
Would you say I have an ADE problem or a Mac problem? I've deleted ADE and relaunched it and nothing helps.
Gary